610555555061 has 4 divisors (see below), whose sum is σ = 614653243500. Its totient is φ = 606457866624.

The previous prime is 610555555039. The next prime is 610555555073. The reversal of 610555555061 is 160555555016.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 402431640625 + 208123914436 = 634375^2 + 456206^2 .

It is a cyclic number.

It is not a de Polignac number, because 610555555061 - 2¹⁸ = 610555292917 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (610555555021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2048843996 + ... + 2048844293.

It is an arithmetic number, because the mean of its divisors is an integer number (153663310875).

Almost surely, 2^610555555061 is an apocalyptic number.

It is an amenable number.

610555555061 is a deficient number, since it is larger than the sum of its proper divisors (4097688439).

610555555061 is a wasteful number, since it uses less digits than its factorization.

610555555061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4097688438.

The product of its (nonzero) digits is 562500, while the sum is 44.

It can be divided in two parts, 6105555 and 55061, that added together give a palindrome (6160616).

The spelling of 610555555061 in words is "six hundred ten billion, five hundred fifty-five million, five hundred fifty-five thousand, sixty-one".